Business Email Compromise: The Quiet Scam That Reroutes Your Money
Not every costly attack involves malware or a dramatic breach. One of the most expensive scams in business is also one of the quietest: business email compromise (BEC). There is no payload to detect, just a convincing email that persuades someone to send money, or change where it is sent, to an account the attacker controls.
The short version: an attacker takes over or convincingly imitates a trusted email account, studies how the business communicates, then sends a real-looking request to pay an invoice or update bank details. The money is wired straight to them. Because the email carries no malware, it routinely slips past technical filters, which makes verification and process the real defence.
How BEC diverts your money
The attacker either compromises a genuine mailbox, often via phishing, or spoofs a close look-alike. From inside the conversation they learn the tone, the timing and the people involved, waiting for a live invoice or a plausible moment. Then comes the switch: an email, styled exactly like the real ones, asking to update bank details or settle a payment to a new account. The funds go directly to the criminal, and the fraud may not surface until the genuine supplier chases the unpaid bill.
Why it is so costly
BEC quietly reroutes real, expected payments, which is why it has cost organisations billions worldwide and consistently ranks among the highest-value cybercrimes. It exploits routine business processes rather than technical flaws, so even well-defended organisations are vulnerable if their payment approvals rely on trust alone.
How to stop it
Verify every change of bank details
Treat any request to change payment details as suspect until confirmed through a separate, known channel: a phone call to a saved number, never the contact details in the email.
Require dual approval for payments
Two-person sign-off on significant or changed payments removes the pressure of a single urgent instruction and catches the switch.
Harden email against impersonation
Enforce email authentication and check your exposure to domain spoofing, so attackers find it harder to imitate your senders.
Train and report
Teach finance teams that urgency around money is a reason to slow down. Run realistic simulations and make it easy to report suspicious emails.
The bottom line
Business email compromise beats technology by targeting process and trust, so process and verification are what defeat it. Confirm bank-detail changes out-of-band, require dual approval, harden your domain against impersonation, and treat financial urgency as a prompt to check, and the costliest quiet scam in business runs out of room.
Phishing Tackle offers the tools businesses need to strengthen their human risk strategies, with multi-platform testing, real-time behavioural insights, and actionable data to keep your organisation ahead of modern cyber threats.
Contact us today to learn how Phishing Tackle can help safeguard your organisation from the growing array of cyber risks.
